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physical object > natural object > particle > charged particle > electron > free electron > delta-ray |
delta-ray comparison table |
Subject | is a kind of | has definition |
---|---|---|
free electron | electron | Electron not bound to a nucleus. |
delta-ray | free electron | A recoil electron ejected from an atom by an energetic charged particle. Delta-rays appear as branches in the main track of a cloud chamber. |
Up: free electron